Causes of Glaucoma

DEFINITION
Glaucoma is a disease where the pressure inside the eye increases, causing damage to the optic nerve and cause vision impairment.

There are four types of glaucoma:
* Open Angle Glaucoma
* Closed Angle Glaucoma
* Glaucoma Kongenitalis
* Secondary Glaucoma.

The fourth type of glaucoma is characterized by increased pressure inside the eyeball, and therefore it can lead to progressive optic nerve damage.

CAUSE
Anterior chamber and posterior eye chamber filled with fluid called aqueous humor aqueus. Under normal circumstances, this fluid is produced in the posterior chamber, through the pupil into the anterior chamber of the eye and then flows through a duct.

Causes of Sinusitis

DEFINITIONSinusitis is an inflammation of the sinuses that occurs due to allergy or infection with viruses, bacteria and fungi. Sinusitis can occur in any of the four existing sinus (maxillary, etmoidalis, frontal or sfenoidalis).
CAUSESinusitis can be acute (lasting for 3 weeks or less) or chronic (lasting for 3-8 weeks but can continue for many months or even years).
The cause of acute sinusitis:- Virus infection.Acute sinusitis can occur after a viral infection of the upper respiratory tract (eg colds).
- Bacteria.In the human body there are several types of bacteria that normally do not cause disease (eg Streptococcus pneumoniae, Haemophilus influenzae). If the body's defense system decreases or the drainage of sinus congestion due to colds or other viral infections, the bacteria that were not dangerous will proliferate and infiltrate into the sinuses, causing an acute sinus infection.

Cause of Cataracts

Definition : Cataracts are opacities in the lens of the eye that causes visual impairment.
Cause :In many cases, the cause is unknown. Cataracts usually occur in the elderly and can be lowered. Cataract formation is accelerated by environmental factors, such as smoking or other toxic materials.
Cataracts can be caused by:* Injury to the eye* Metabolic diseases (eg diabetes)* Certain medications (eg corticosteroids).
Kongenitalis cataract cataract is found in infants at birth (or some time later).Cataracts can kongenitalis is a hereditary disease (autosomal dominant inherited)